#pragma mark----以下代理控制UIScrollView的手势返回代理
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer
*)gestureRecognizer {
if ([self panBack:gestureRecognizer]) {
return NO;
}
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer {
if ([self panBack:gestureRecognizer]) {
return YES;
}
return NO;
}
//location_X可自己定义,其代表的是滑动返回距左边的有效长度
- (BOOL)panBack:(UIGestureRecognizer*)gestureRecognizer {
int location_X = 100;
if (gestureRecognizer ==self.panGestureRecognizer) {
UIPanGestureRecognizer *pan = (UIPanGestureRecognizer*)gestureRecognizer;
CGPoint point = [pan translationInView:self];
UIGestureRecognizerState state = gestureRecognizer.state;
if (UIGestureRecognizerStateBegan == state || UIGestureRecognizerStatePossible== state) {
CGPoint location = [gestureRecognizer locationInView:self];
if (point.x > 0 && location.x < location_X && self.contentOffset.x <= 0) {
return YES;
}
}
}
return
NO
;
}
